Answer:
56
Step-by-step explanation:
70 / 10 = 7 > 8 * 7= 56 hha hope this helps
Answer:
y=4
Step-by-step explanation:
2(-9y)+10y=-32
-18y+10y=-32
-8y/-8 = -32/-8
y=4
Is there like a question on paper with choices? It’s kind of confusing when you need to multiply yourself, and it seems like there would be a A, B, C, D on this.
Answer:
B 4.6 and 9.4 hours per night.
Step-by-step explanation:
Answer:
Q1 = 54.25 ; Q3 = 82.75 ; IQR = 28.5 ; Outliers = 4, 6, 8
Step-by-step explanation:
Quartiles divide data into 4 equal parts. Q1 has 25% data below it & 75% above it, Q3 has 75% data below it & 25% data above it.
Quartile Calculation for 30 number of observations
- Ascending order : 4, 6, 8, 20, 45, 48, 52, 55, 56, 60, 63, 65, 67, 68, 70, 74, 75, 77, 78, 79, 80, 81, 82, 85, 87, 88, 90, 92, 95, 99
- Q1 = (N + 1) / 4th observation = [ (30 + 1)/4 ] th obs. = (31 /4) th = 7.75th = 7th item + 0.75 (7th - 8th item) = 52 + 0.75 (55-52) = 52 + 0.75(3) = 52 + 2.25 = 54.25
- Q3 = 3 [(N+1) / 4] th observation = 7.75 x 3 = 23.25th item = 23rd item + 0.25 (24th - 23rd item) = 82 + 0.25 (85-82) = 82 + 0.25 (3) = 82 + 0.75 = 82.75
- Interquartile range (IQR) = Q3 - Q1 = 82.75 - 54.25 = 28.5
Outliers are the observations less than Q1 - 1.5 (IQR) , more than Q3 + 1.5 (IQR)
- Q1 - 1.5 (IQR) = 54.25 - 1.5 (28.5) = 54.25 - 42.75 = 11.5 .So, numbers less than 11.5, ie 4, 6, 8 are outliers
- Q3 + 1.5 (IQR) = 82.75 + 1.5 (28.5) = 82.75 + 42.75 = 125.5 .There are no numbers > 125.5
